Quarter	US dollars
2004-12-31	17817
2005-03-31	25424
2005-06-30	25932
2005-09-30	30752
2005-12-31	19770
2006-03-31	32791
2006-06-30	29920
2006-09-30	30396
2006-12-31	34298
2007-03-31	30516
2007-06-30	34576
2007-09-30	37154
2007-12-31	42104
2008-03-31	46454
2008-06-30	31044
2008-09-30	35806
2008-12-31	46820
2009-03-31	28540
2009-06-30	26573
2009-09-30	34353
2009-12-31	30647
2010-03-31	36097
2010-06-30	34915
2010-09-30	39931
2010-12-31	23072
2011-03-31	25885
2011-06-30	24893
2011-09-30	34556
2011-12-31	30945
2012-03-31	31105
2012-06-30	36258
2012-09-30	39118
2012-12-31	43458
2013-03-31	39005
2013-06-30	32089
2013-09-30	34164
2013-12-31	30567
2014-03-31	30447
2014-06-30	30311
2014-09-30	33630
2014-12-31	38155
2015-03-31	47329
2015-06-30	34458
2015-09-30	35809
2015-12-31	30406
2016-03-31	38670
2016-06-30	23975
2016-09-30	22738
2016-12-31	15822
2017-03-31	19862
2017-06-30	21826
2017-09-30	17311
2017-12-31	16034
2018-03-31	18484
2018-06-30	18796
2018-09-30	18673
2018-12-31	14645
2019-03-31	16964
2019-06-30	27897
2019-09-30	36753
2019-12-31	32083
2020-03-31	37453
2020-06-30	37756
2020-09-30	37458
2020-12-31	33699
2021-03-31	26370
2021-06-30	23606
2021-09-30	23051
2021-12-31	19476
2022-03-31	18444
2022-06-30	10437
2022-09-30	11411
2022-12-31	11158
2023-03-31	11303
2023-06-30	11707
2023-09-30	8867